Walthausen & Co., LLC: MTRN position timeline

Available 13F reports, 13D and 13G stakes and each Form 3, 4 and 5 line of Walthausen & Co., LLC on MTRN, newest first. How the timeline and the estimate are built.

Walthausen & Co., LLC held 18,135 MTRN shares at 2022-09-30 per its 13F-HR/A filed 2022-11-14.

the latest 13F is the newest step

period ended2022-09-30
13F/A 18,135 shares
Change vs previous 13F -10,615 shares
1.21% of the 13F portfolio, value $1,451,000.
13F-HR/A 0001483339-22-000006 filed by Walthausen & Co., LLC
Filed 2022-11-14 (acceptance time not in the bulk data set), ingested 2026-10-07 18:34:10 UTC
Acceptance time not in the bulk data set (spec §4.2).
period ended2022-06-30
13F 28,750 shares
Change vs previous 13F -4,430 shares
0.95% of the 13F portfolio, value $2,120,000.
13F-HR 0001483339-22-000004 filed by Walthausen & Co., LLC
Filed 2022-08-12 (acceptance time not in the bulk data set), ingested 2026-10-07 18:35:03 UTC
Acceptance time not in the bulk data set (spec §4.2).
period ended2022-03-31
13F 33,180 shares
Change vs previous 13F -950 shares
0.8% of the 13F portfolio, value $2,845,000.
13F-HR 0001483339-22-000003 filed by Walthausen & Co., LLC
Filed 2022-05-11 (acceptance time not in the bulk data set), ingested 2026-10-07 18:35:57 UTC
Acceptance time not in the bulk data set (spec §4.2).
period ended2021-12-31
13F 34,130 shares
Change vs previous 13F -6,455 shares
0.82% of the 13F portfolio, value $3,138,000.
13F-HR 0001483339-22-000002 filed by Walthausen & Co., LLC
Filed 2022-02-11 (acceptance time not in the bulk data set), ingested 2026-10-07 18:36:54 UTC
Acceptance time not in the bulk data set (spec §4.2).
period ended2021-09-30
13F 40,585 shares
Change vs previous 13F +24,695 shares
0.71% of the 13F portfolio, value $2,786,000.
13F-HR 0001483339-21-000006 filed by Walthausen & Co., LLC
Filed 2021-11-12 (acceptance time not in the bulk data set), ingested 2026-10-07 18:37:51 UTC
Acceptance time not in the bulk data set (spec §4.2).
period ended2021-06-30
13F/A 15,890 shares
Change vs previous 13F 0 shares
0.26% of the 13F portfolio, value $1,197,000.
13F-HR/A 0001483339-21-000005 filed by Walthausen & Co., LLC
Filed 2021-08-13 (acceptance time not in the bulk data set), ingested 2026-10-07 18:38:33 UTC
Acceptance time not in the bulk data set (spec §4.2).
period ended2021-03-31
13F 15,890 shares
Change vs previous 13F -11,658 shares
0.22% of the 13F portfolio, value $1,053,000.
13F-HR 0001483339-21-000003 filed by Walthausen & Co., LLC
Filed 2021-05-13 (acceptance time not in the bulk data set), ingested 2026-10-07 18:39:37 UTC
Acceptance time not in the bulk data set (spec §4.2).
period ended2020-12-31
13F 27,548 shares
Change vs previous 13F not available
0.48% of the 13F portfolio, value $1,755,000.
13F-HR 0001483339-21-000002 filed by Walthausen & Co., LLC
Filed 2021-02-12 (acceptance time not in the bulk data set), ingested 2026-10-07 18:42:52 UTC
Acceptance time not in the bulk data set (spec §4.2).